An odor blender is provided in which a number of component odor gases may be increased without increasing the number of carrier gas containers while ensuring a single odor gas concentration is not reduced. The odor blender includes N odor containers, M less than N) carrier gas containers, a blend line leading to a blend part for blending the odor gases, a bypass line for discharging odor gases, and solenoid valves for switching the containers between the blend line and the bypass line. A computer sets the number of odor containers connected to the blend line at the same time to M or less, connects the same number of carrier gas containers to the bypass line as the number of odor containers connected to the blend line, and controls timing of connection of odor containers to the blend line based on a predetermined mixing ratio of the component odor gases.